Hypodermic syringe hinging head



March 30, 1954 w. P. WADINGER HYPODERMIC SYRINGE HINGING HEAD lllll sFiled Sept. 14, 1951 INVENTOR. Walt er P. Wu din gel lf- 7% AttorneyPatented Mar. 30, 1 954 2,673,562 HYPODERMIC SYRINGE HINGING HEAD WalterP. Wadinger, Cheshire, Conn, assignor to covill Manufacturing Company,

Waterbury,

Comm, a corporation of Connecticut Application September 14, 1951,

Serial No. 246,574

2 Claims. (Cl. 128218) ing heads for such syringes.

One of the objects of manufacture.

According to my invention the h-inging head, including the side handlesand pivot arms, is

one embodiment shown in the accompanying drawing wherein:

Fig. 1 is a side elevation of my improved hypodermic syringe.

Fig. 2 is a longitudinal sectional view through the same on an enlargedscale.

Fig. 3 is a sectional view similar to Fig. 2 of the upper part of thesyringe showing the plunger hinged to one side for purposes of chargingthe syringe.

Fig. 4 is a sectional view taken along the line of 4-4 of Fig. 2, and

Fig. 5 is a perspective view of the yoke member, per se.

Referring now to the drawing there is provided a tubular casing orholder l having the section M for engagement with the female bushingtubular needle l extending from both ends of the hub, the longer outerpart l5a of the needle serving to administer the The main body part ofthe hub I3 18 provided with a knurled surface [6, and the provided witha pair of opposed elongated openings I 7 in order to permit visibleinspection of the ampul when fitted therein.

The opposite end of the holder i0 is provided with a 'hinging yoke orhead member t8 which comprises a cup-shaped housing [9 having an theyoke I8 upon said holder. There is suflicient spring in the pivot armsand the barrel to allow them to be assembled by a snap action.

Thus all of the exposed parts of the heads including the housing 19, thehandle arms 23 and the pivot arms 22 are just one unitary structurespring 35 and thus lock the yoke I8 in aligned position with the holderID. The spring 35 surrounds the plunger rod 30 and has one end seatedagainst an interior flange 36 provided within the sleeve 34 and theopposite end abuts the inner surface of the closed end 2E! of yoke 18.The sleeve is limited in its movement into the body shell It) by reasonof the length of the trunnions 25 that project inwardly of the innersurface of the holder in and against which the sleeve can abut as a stopas best shown in Fig. 2.

In the operation of the device when it is desired to charge the holderH! with an ampul the thumb piece 33 will be pulled outwardly to aposition where the sleeve 34 will clear the end of the holder 10whereupon the yoke i8 and plunger 30 can be pivoted to one side to aposition as shown in Fig. 3. It is to be noted that the upper end of theholder in is provided with a pair of opposed cutouts 31 so as to permitthe yoke and plunger to be pivoted to either side of said holder leavingits open end free to be charged with the ampul. The yoke member willthen be brought back into an aligned position with the body shell bymanipulation of the handle members whereupon the sleeve 34 willautomatically cam over either one of the cutouts 31 and when into theopen the holder Hi to maintain such aligned position. The headed end ofthe plunger rod may then be secured to the plunger of the ampul and thesyringe will then be ready for operation in the usual manner.

One form of the invention is presented herein for the purpose ofexemplification but it will be appreciated that the invention issusceptible of embodiment in other structural modified forms comingequally within the scope of the appended claims.

end of I claim:

1. A hypodermic syringe comprising in combination a tubular casing,means at the lower end of said casing for carrying a needle, the upperend being open to receive an ampul, a hinging head for closing saidupper end of the casing after insertion of the ampul comprising a hollowinverted cuphaped housing of substantially the same diameter as thecasing and having integral diametrically opposite handle arms extendinglaterally from its bottom portion and a pair of pivot arms embracingsaid upper end of said casing and also integrally joined to said housingbetween the handle arms, said pivot arms being hingedly connected to thecase and offset lateral- 1y relative to the housing so as to swingfreely over the end portion of said casing, a plunger slidably carriedin said housing, and a springbacked locking sleeve mounted in saidhousing for releasably holding said housing in alignment with saidcasing.

2. A hypodermic syringe comprising, in combination, a tubular holder, ahead closing one end of said holder, means hinging the head to saidholder comprising a pair of oppositely disposed arms extending from thehead and embracing the adjacent end of said holder, and a bossprojecting inwardly from the end portion of each arm and trunnionsextending from said bosses into bearing recesses in said tubular holder.

WALTER P. WADINGER.

Name

Brockway Date Oct. 19, 1926 Number

